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chapter 12 vocab: periodic table
| Question | Answer |
|---|---|
| periodic | describes something that occurs or repeats at regular intervals |
| periodic law | the law thatstates that the repeating chemical and physical properties of elements change periodically with the atomic #'s of the elements |
| period | in chemistry, a horizontal row of elements in the periodic table |
| group | a vertical column of elements in the periodic table; elements in a group share chemical properties |
| alkali metal | one of the elements of group 1 of the periodic table(lithium,sodium,potassium,rubidiun,cesium,and francium) |
| alkaline-earth metal | one of the elements of group 2 of the periodic table(beryllium, magnesium, calium, strontium, barium, and radium) |
| halogen | one of the elements of group 17 of the periodic table(fluorine, chlorine, bromine,iodine,and astatine); halogens combine with most metals to form salts |
| noble gas | one of the elements of group 18 (helium,neon,argon,krypton,xenon,and radon);noble gases are unreative |
| one of the elements of group 17 of the periodic table(fluorine, chlorine, bromine,iodine,and astatine); halogens combine with most metals to form salts | |
| noble gas |